Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites

Luis F.O. Silva; Tito J. Crissien; Carlos H. Sampaio; James C. Hower; Shifeng Dai

doi:10.1016/j.fuel.2019.116740

Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites

Luis F.O. Silva, Tito J. Crissien, Carlos H. Sampaio, James C. Hower, Shifeng Dai

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

Petrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in the middle to heavy rare earths (REE) while the Virginia semi-anthracite exhibited a decreasing trend through the light REE, a peak in Gd, and a depletion in the heavy REE. Substitution of As, Hg, and Se in pyrite was most apparent in the Virginia coal. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites contained spherical carbon nanotube (CNT) structures. The CNTs contained several elements, including Hg, Cd, F, Cl, and Br. While CNTs are known to be produced from coals of varying ranks, this seems to be the first report of naturally occurring CNTs.

Original language	English
Article number	116740
Journal	Fuel
Volume	263
DOIs	https://doi.org/10.1016/j.fuel.2019.116740
State	Published - Mar 1 2020

Bibliographical note

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

Carbon nanotubes
Coal rank
Mercury
Rare earth elements

ASJC Scopus subject areas

Chemical Engineering (all)
Fuel Technology
Energy Engineering and Power Technology
Organic Chemistry

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10.1016/j.fuel.2019.116740

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title = "Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites",

abstract = "Petrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in the middle to heavy rare earths (REE) while the Virginia semi-anthracite exhibited a decreasing trend through the light REE, a peak in Gd, and a depletion in the heavy REE. Substitution of As, Hg, and Se in pyrite was most apparent in the Virginia coal. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites contained spherical carbon nanotube (CNT) structures. The CNTs contained several elements, including Hg, Cd, F, Cl, and Br. While CNTs are known to be produced from coals of varying ranks, this seems to be the first report of naturally occurring CNTs.",

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AU - Crissien, Tito J.

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AU - Hower, James C.

AU - Dai, Shifeng

PY - 2020/3/1

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N2 - Petrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in the middle to heavy rare earths (REE) while the Virginia semi-anthracite exhibited a decreasing trend through the light REE, a peak in Gd, and a depletion in the heavy REE. Substitution of As, Hg, and Se in pyrite was most apparent in the Virginia coal. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites contained spherical carbon nanotube (CNT) structures. The CNTs contained several elements, including Hg, Cd, F, Cl, and Br. While CNTs are known to be produced from coals of varying ranks, this seems to be the first report of naturally occurring CNTs.

AB - Petrographic, geochemical, and electron microbeam investigations of selected anthracites and anthracite-rank coaly shales were conducted. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites show an enrichment in the middle to heavy rare earths (REE) while the Virginia semi-anthracite exhibited a decreasing trend through the light REE, a peak in Gd, and a depletion in the heavy REE. Substitution of As, Hg, and Se in pyrite was most apparent in the Virginia coal. The Pennsylvania, Rhode Island, and KwaZu-Natal anthracites contained spherical carbon nanotube (CNT) structures. The CNTs contained several elements, including Hg, Cd, F, Cl, and Br. While CNTs are known to be produced from coals of varying ranks, this seems to be the first report of naturally occurring CNTs.

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KW - Coal rank

KW - Mercury

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Occurrence of carbon nanotubes and implication for the siting of elements in selected anthracites

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

Access to Document

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